`install_dockerize` overwrite project files with `dockerize` v0.11.0

[ybiquitous]

Orb version

3.0.1

What happened

The install_dockerize command extracts the dockerize tarball in the current working directory (typically, the project root).

Starting with dockerize v0.11.0, the tarball includes README.md and LICENSE files in addition to the dockerize binary. This causes the project's own README.md and LICENSE to be silently overwritten during extraction.

$ curl -sL https://github.com/jwilder/dockerize/releases/download/v0.11.0/dockerize-linux-amd64-v0.11.0.tar.gz | tar tzf -
LICENSE
README.md
dockerize

The relevant code in install_dockerize.sh:

docker-orb/src/scripts/install_dockerize.sh

Lines 49 to 53 in e8af393

	# download & install binary
	curl -O --silent --show-error --location --fail --retry 3 \
	"$DOCKERIZE_BINARY_URL"
	tar xf "dockerize-$PLATFORM-$DOCKERIZE_VERSION.tar.gz"

This extracts all files into the current directory without any path restriction.

Previous dockerize releases only contained the dockerize binary, so this was not an issue before.

$ curl -sL https://github.com/jwilder/dockerize/releases/download/v0.10.0/dockerize-linux-amd64-v0.10.0.tar.gz | tar tzf -
dockerize

Expected behavior

install_dockerize should not modify any project files.